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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d83cf8a720af59c89d562d1dae670f2188b6a40f3d8420cc3ffe2fccc7f2dd9' 
  AND token = '602y1MdfL/SI4FeYyUpXmRF/hW72JX1orZIfiKO6mss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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