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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5dab324a2bac6ee07eec27c5d8e5645a2e7ee682359cb4d28420914a8be2e055' 
  AND token = '0EJ/KtzTpv6sWLSqi/T/47nRJVFdbEepmMZL/Lw62ak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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