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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '287b769371a91e229177cb190eeef32dbabadbaa66da75e600ea63994c6068fe' 
  AND token = 'wZqQYE6yeuxio2ZS6PeGX3tZuj2FwTTC0dhON3QyKdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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