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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '944df8cc492486040f4f4d2b07f07b1dc8b81518896276b5742caf235635b979' 
  AND token = 'Hvcy/YH2Pc/eDFN2UKWzDfeqQdFX4xjfsYpmxUTrSiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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