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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f6dce9caf46b0ddceff327583de9e5bbcea86d75e23f5bbc6562292cf8dae42' 
  AND token = 'eqTjpLzwYDvYyWy1EnBn3k1tipVNU4h0tXNQ4ClNBzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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