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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60bfbbac54baaa242a57959b4e81638d102837ea095d4ac25b7ca7c31a34c24d' 
  AND token = 'vkHjURtogm1yCMzv0mx0mByAs0zbKyDomdFjWAFq4fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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