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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd06aaafaf9c2e2c087bfcb7376b4130bb0eada5a3353cf7b5d82eb84bb7a4c8' 
  AND token = 'EJUf9+9au+xxRRhiHMJFLoQjqYcH249s8X1qdk+c6zE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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