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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b84d17422f7b6733986d8a67f7b883be4eead7f11914ac3000ea347d09e07998' 
  AND token = 'o1/ePGDNZ8Qhzr3cMVSpogo+iLNQW/K33K6gg//fbQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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