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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35e6a3f363af005faff4c85966a3b32bd06d0b2245f17cf506bb706371fe8a3e' 
  AND token = 'Es7MiGa1cLOO2HJPM1md7TPDDQwYP0SrMlx78NluDMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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