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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd22ffcecf99132825cb60ba8f9fc61e067cf38a423641852b4f74473cc6986e' 
  AND token = '9t5rQedw3rOWyKGdPxSz4fN0iblxl1s+EqBtg0usPe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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