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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0caa4d5c138a1554f3e8f7f94d7168adc34b1ebe614c51560ff3ecba25cfb4d5' 
  AND token = 'WZfR5Q2PdmCNzCfP3EZRlR0eAr5K5DETKz00uop0B4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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