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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b0a240c4fce12b18f0da95871b8f45e88e124d4df8d19004d23065a28e1330c' 
  AND token = 'w1ZP5Ulm5hXDci4zkmlx+FRFPdIOCVMZztcwM80equE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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