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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '802144826f63805a2d86b7b7881d3ae632f03874c638e308e37e5724f47d386c' 
  AND token = 'gRBYdJ9Ny5fYypgGX90LPP7E+hrPLdSS8tZ55QK2qpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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