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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc3ee523cb0479a1035757e9cd0b8ab5247ad75373e9c5e4b17231a492efe993' 
  AND token = 'oL23xAwOofKeRvtmoO90u6Rm7vDI3E+1OyKl+bTNEX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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