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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fce5607129f0b4ed949f9e04d40a980bb53cfa64707b72beb33bfd1a41f2c151' 
  AND token = 'BpjVSGu7e4BjwCKp7r0O/tdbDjvDdUj2NVuhkLRHYwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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