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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ca7084aa8777dcd14bef12e35671af7d7c76b812fdf7455bff44c3f2cdc7db7' 
  AND token = 'Ke30ij14olF/L1ZWJHA21JDIyHOWb2x6faJOJEEJ9Nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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