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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cce8988f0da8781bec24d431e52290a5f990714636a06706d0ac6c3cfcf43b2' 
  AND token = 'cpG4NpfxLsbOlbtdRBwkIRaAvm0yPr2DQAx7z5sqBik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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