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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac57ddca46d88adacd8c5ccbb3dd0684e1973619a583455627f87688edc57abe' 
  AND token = 'tt/CSKDdzYqAA/NxjhX4wF3DPTAyhti3A3B3aRlYDEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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