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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da972b0f5d62df19dc89b9a0e4865b2b8c755d2ced237ae0b4f67d7b3cdf7e8a' 
  AND token = 'cUo21cvsmzqPd/pvvuluWB0FdLBpbFFQFX4v/CDcnLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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