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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01af69e90723f31507e35327b585b4544b5c1dd2e07f332ab27c8fb3bc5aee88' 
  AND token = 'C18jl3yj20ny1t0lqCXH8PGkRrWwuB0XM2j9P8TMkAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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