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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d7871a8def5d81fef1cc22d5d1eb8f85de6c01e4e35386f0a5a875e5f78f15b' 
  AND token = 'jVHsK69epb/qyLU0PQItYV2CjSI2ppPqy8a7URx98Aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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