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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1aff0e2856e2828a14c05c0761d7a8b380d65da7ba9607b88b2c9426c7b7760' 
  AND token = 'wHLVBSwFqWgU1Mbj6EQ52pfVtAoxiX5oCGew8DqgyKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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