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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a8c2d6e737a32ea6e646f7118538ea837a96b3a55410c90d3e5e02d0654f7b2e' 
  AND token = 'z2GqE1amiZsF8TsqXPaoNdTjZIHFc0+PquH9ocZoxWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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