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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc701cab3485f4ac105b55f968a56cf795ef6dca0da3a12d19e72d9a964e562f' 
  AND token = 'RIi6LL14GlV+CoV9BnbROQGFSKu4I0TUPZR1kP5tP60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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