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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed233e1b86f8e1c5c50e7fd6431ff32cd76ae24c4dd4cdaa133e98ca53bd20d1' 
  AND token = '9m32K54ymsx7XpwECyjD9BycibCBDbSBVIAeq2Ck/9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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