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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ab01c507180f52e9c4117fe82096d2a961da0b2b7cd8a6d11eef6779ec25bd6' 
  AND token = 'G99jcW45y9iJRKYN9lVYHuAR3307gC4+kEIxIyGtCyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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