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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae97af7306997c3f1ae47d5056dca199c9271dac4856e86d162c079279ad700e' 
  AND token = 'ReMiO9ecpdZkAl3MAkzy0o0EtJJmrs5LZ3DjJClcnDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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