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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd970539ae23128e47cddcefe78fe6c48ae07b51701c267e110e434fbc0e8f4a1' 
  AND token = 'yh+CjGDtrxPzMbmpxPN+DNr12OzwMo9bFXXJG+grEgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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