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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '092180bc25d9e41b9434bf6b55647d5c2e31a8b7cf4fd281db22f55f871305e2' 
  AND token = 'p6G/en5t6y5G/3QZ18z3LPMAjvKAAx8Kk8H1xM22l14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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