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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5391806c8e12988eba4a6eb4ca9230c39d14a74eaf2cef8067cfff14f3d50336' 
  AND token = 'IbvHTl1DIFad8ZY7d7YieSnvSTEzdv9zdluGKfxBeOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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