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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dbb05d6691328eea134c1c735ead0997062ff8faa0f60a865e6b66aa8dd735b' 
  AND token = 'Wp45RccHDoH1RP4fr14r9kwUVpTQBBTKGSNqEBTnndI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}